作者机构:[1]Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha 410081, China, [2]Department of Physics, Hunan Normal University, Changsha 410081, China
相关基金:Project supported by the National Natural Science Foundation of China (Grant Nos 10375042 and 10775018) and the Scientific Research Fund of Hunan Provincial Education Department and Hunan Provincial Natural Science Foundation of China (Grant No 08jj6043) and the Construct Program of the Key Discipline in Hunan Province, China.